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California driving lesson · Turns, Merging & Parking

Crossing traffic & passing

A 3-minute lesson from the California course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Turns, Merging & Parking
Checkpoint questions
6
Source pages
30, 31

Entering, crossing and passing all require judging space and time. The handbook gives specific gap sizes and a list of places where passing is off-limits.

To merge, enter, or exit traffic, you need a space that is:

  • Half a block on city streets (about 150 feet)
  • A full block on the highway (about 300 feet)
Handbook p. 30 ↗

Know the rule

When entering traffic from a full stop, signal and leave enough space to get up to the speed of traffic.

Handbook p. 30 ↗

Know the rule

Even on a green light, do not start across an intersection if pedestrians or vehicles are blocking your path.

Handbook p. 30 ↗

Know the rule

When turning left, do not assume an oncoming vehicle with its right signal on will turn before reaching you. Wait for it to start its turn.

Handbook p. 30 ↗
⅓ mile

A hill or curve should be at least this far ahead to pass safely

Handbook p. 30 ↗

Do not pass:

  • When approaching a hill or curve and you cannot see if traffic is coming
  • Within 100 feet of an intersection, bridge, tunnel, railroad crossing, or other hazardous area
  • At crossroads and driveways
  • Unless you have enough space to return to your lane
Handbook p. 30 ↗

Know the rule

Before passing, judge your space whenever you approach an oncoming vehicle or bicyclist, a hill, curve, intersection, or road obstruction.

Handbook p. 30 ↗

To pass on an open highway:

  • Signal that you plan to pass
  • Look over your shoulder to check your blind spots
  • Drive into the passing lane
  • Speed up to pass the vehicle
  • Signal and return to your original lane
Handbook p. 31 ↗

You may pass on the right only when:

  • An open highway has two or more lanes going your direction
  • The driver ahead is turning left and you can safely pass on the right
  • You are on a one-way street
Handbook p. 31 ↗

Know the rule

Never pass on the left if the driver ahead is signaling a left turn. Never drive off the paved or main-traveled part of the road to pass.

Handbook p. 31 ↗

Know the rule

If a vehicle is passing you or signals it plans to, allow it to pass. Maintain your lane position and speed.

Handbook p. 31 ↗

Put it into practice

On a two-lane road, a slow truck is ahead and a bridge is coming up. You're about 80 feet from the bridge. Don't pass: passing is not allowed within 100 feet of a bridge. Wait until you are past it and have enough room.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

About how much space, in feet, do you need to enter or cross traffic on a city street (half a block)?
  1. About 50 feet
  2. About 300 feet
  3. About 150 feet
  4. About 500 feet

Answer: About 150 feet

Entering or crossing traffic on a city street needs about half a block, roughly 150 feet.

Handbook p. 30 ↗
About how much space do you need to enter or cross highway traffic (a full block)?
  1. About 150 feet
  2. About 600 feet
  3. About 1,000 feet
  4. About 300 feet

Answer: About 300 feet

Entering or crossing highway traffic needs about a full block, roughly 300 feet.

Handbook p. 30 ↗
To safely pass on a hill or curve, how far ahead should you be able to see?
  1. At least 1/3 mile
  2. At least one mile
  3. At least 100 feet
  4. At least 1,000 feet

Answer: At least 1/3 mile

The hill or curve should be visible for at least one-third of a mile before passing.

Handbook p. 30 ↗
Within how many feet of an intersection, bridge, or railroad crossing should you not pass?
  1. 25 feet
  2. 100 feet
  3. 500 feet
  4. 50 feet

Answer: 100 feet

Do not pass within 100 feet of an intersection, bridge, tunnel, railroad crossing, or other hazardous area.

Handbook p. 30 ↗
You approach a driver ahead who is turning left. When may you pass them on the right?
  1. Never; passing on the right is always illegal
  2. Only on freeways with 3+ lanes
  3. When you can safely pass on the right
  4. By using the paved shoulder

Answer: When you can safely pass on the right

You may pass on the right when the driver ahead is turning left and you can safely do so.

Handbook p. 31 ↗
If a vehicle is passing you, what should you do?
  1. Speed up to prevent being passed
  2. Move onto the shoulder
  3. Slow down sharply
  4. Keep your lane and speed

Answer: Keep your lane and speed

If being passed, maintain your lane position and speed to allow the vehicle to pass safely.

Handbook p. 31 ↗
Take the lesson checkpoint in the app

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